You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.
eth-manager was reported malicious
OSV:MAL-2024-5115 - Malicious code in eth-manager (PyPI)

eth-manager

This package was deleted from PyPI around 2023-10-11. Installing fails with:
$ pip3 install eth-manager ERROR: Could not find a version that satisfies the requirement eth-manager (from versions: none) ERROR: No matching distribution found for eth-manager

Install through StableBuild

You can install this package from StableBuild's PyPI snapshots from before the version was deleted:
pip3 install \ -i https://YOUR_API_KEY.pypimirror.stablebuild.com/2023-10-10/ \ eth-manager
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Or, download files manually

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0.8.0
0.8.1